bus/kdbus-d.c

   1 /*
   2  * kdbus-d.c
   3  *
   4  *  Created on: Sep 4, 2013
   5  *      Author: r.pajak
   6  *
   7  *  kdbus add-on to dbus daemon
   8  *
   9  */
  10
  11 #include "kdbus-d.h"
  12 #include <dbus/kdbus.h>
  13 #include <dbus/dbus-connection-internal.h>
  14 #include <dbus/dbus-bus.h>
  15
  16 #include <utils.h>
  17 #include <stdlib.h>
  18 #include <stdio.h>
  19 #include <fcntl.h>
  20 #include <unistd.h>
  21
  22 char* make_kdbus_bus(DBusBusType type, DBusError *error)
  23 {
  24     struct {
  25         struct kdbus_cmd_bus_make head;
  26         uint64_t n_size;
  27         uint64_t n_type;
  28         char name[64];
  29     } __attribute__ ((__aligned__(8))) bus_make;
  30
  31     int fdc, ret;
  32     char *bus;
  33
  34     /*TODO Distinguish session and system bus make*/
  35     /*TODO Add dbus_set_error(error, DBUS_ERROR_FAILED,  "...") (?)*/
  36
  37     _dbus_verbose("Opening /dev/kdbus/control\n");
  38     fdc = open("/dev/kdbus/control", O_RDWR|O_CLOEXEC);
  39     if (fdc < 0)
  40     {
  41         _dbus_verbose("--- error %d (%m)\n", fdc);
  42         return NULL;
  43     }
  44
  45     memset(&bus_make, 0, sizeof(bus_make));
  46     bus_make.head.bloom_size = 64;
  47     bus_make.head.flags = KDBUS_MAKE_ACCESS_WORLD;
  48
  49     snprintf(bus_make.name, sizeof(bus_make.name), "%u-kdbus", getuid());
  50     bus_make.n_type = KDBUS_MAKE_NAME;
  51     bus_make.n_size = KDBUS_PART_HEADER_SIZE + strlen(bus_make.name) + 1;
  52     bus_make.head.size = sizeof(struct kdbus_cmd_bus_make) + bus_make.n_size;
  53
  54     _dbus_verbose("Creating bus '%s'\n", bus_make.name);
  55     ret = ioctl(fdc, KDBUS_CMD_BUS_MAKE, &bus_make);
  56     if (ret)
  57     {
  58         _dbus_verbose("--- error %d (%m)\n", ret);
  59         return NULL;
  60     }
  61
  62     if (asprintf(&bus, "kdbus:path=/dev/kdbus/%s/bus", bus_make.name) < 0)
  63     {
  64         BUS_SET_OOM (error);
  65         return NULL;
  66     }
  67
  68     _dbus_verbose("Return value '%s'\n", bus);
  69         return bus;
  70 }
  71
  72 DBusServer* fake_server(char* address)
  73 {
  74         return dbus_server_init_mini(address);
  75 }
  76
  77 DBusConnection* daemon_as_client(DBusBusType type, char* address, DBusError *error)
  78 {
  79         DBusConnection* connection;
  80
  81         dbus_bus_set_bus_connection_address(type, address);
  82
  83         connection = dbus_bus_get(type, error);
  84         if(connection == NULL)
  85                 return NULL;
  86
  87         if(dbus_bus_request_name(connection, DBUS_SERVICE_DBUS, 0, error) != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
  88                 goto failed;
  89
  90         dbus_bus_add_match(connection, "type='signal', member='NameAcquired'", error);
  91         dbus_bus_add_match(connection, "type='signal', member='NameLost'", error);
  92         if(dbus_error_is_set(error))
  93         {
  94 failed:
  95                 _dbus_connection_close_possibly_shared (connection);
  96                 dbus_connection_unref (connection);
  97                 connection = NULL;
  98         }
  99         else
 100                 _dbus_verbose ("Daemon connected as kdbus client.\n");
 101
 102         return connection;
 103 }